<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>列嵌套</title>
		<link rel="stylesheet" href="../chapter2/bootstrap/css/bootstrap.min.css">
		<style>
			div[class=col] {
				border: 1px solid red;
				height: 270px;
				margin: 10px 10px;
				border-radius: 10px;
			}
		</style>
	</head>
	<body>
		<div class="container">
			<div class="row">
				<div class="col">
					<div class="row">
						<div class="col">第一列</div>
						<div class="col">第二列</div>
					</div>
				</div>
				<div class="col">2</div>
				<div class="col">3</div>
				<div class="col">4</div>
			</div>
			<div class="row">
				<div class="col">1</div>
				<div class="col">2</div>
				<div class="col">3</div>
				<div class="col">4</div>
			</div>
		</div>
	</body>
</html>